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Unsafe deserialization in Apache MINA SSHD

Critical severity GitHub Reviewed Published Nov 16, 2022 to the GitHub Advisory Database • Updated Aug 18, 2023

Package

maven org.apache.sshd:sshd-common (Maven)

Affected versions

< 2.9.2

Patched versions

2.9.2
maven org.apache.sshd:sshd-core (Maven)
< 2.1.0
2.9.2

Description

Class org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider in Apache MINA SSHD <= 2.9.1 uses Java deserialization to load a serialized java.security.PrivateKey. The class is one of several implementations that an implementor using Apache MINA SSHD can choose for loading the host keys of an SSH server.

Until version 2.1.0, the code affected by this vulnerability appeared in org.apache.sshd:sshd-core. Version 2.1.0 contains a commit where the code was moved to the package org.apache.sshd:sshd-common, which did not exist until version 2.1.0.

References

Published by the National Vulnerability Database Nov 16, 2022
Published to the GitHub Advisory Database Nov 16, 2022
Reviewed Nov 21, 2022
Last updated Aug 18, 2023

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.505%
(76th percentile)

Weaknesses

CVE ID

CVE-2022-45047

GHSA ID

GHSA-fhw8-8j55-vwgq

Source code

Credits

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